Genius - an umbrella that shrinks when you walk through a crowd or simply pass by someone!
One of my biggest pet peeves is inconsiderate people who ram their umbrellas into you when walking down a crowded sidewalk in the rain. Presto! The Polite Umbrella. It might not stop them from charging toward you, but you can do a quick fake out with the pull of a handle. Also great for those super windy days that love to tear your brand new umbrellas to shreds.
This is absolutely perfect, I could not even explain how annoying it is trying to get to class with other people's umbrellas knocking you over